N.H. Rev. Stat. § 31:8-a
The board of selectmen may vote to pay, from amounts appropriated by the town for town officers' expenses, such amounts as shall be payable for annual membership in the New Hampshire Municipal Association and expenses incurred in attending regular meetings of the said association, provided that the appropriation of such dues has not previously been rejected by a vote at the annual town meeting and provided further that the association shall not record association positions before the general court or committees thereof on matters which do not directly affect New Hampshire towns and cities, nor engage in partisan political activity by endorsing, or otherwise supporting, any political party or candidate.
RSA 31:8-a
1961, 81:2, eff. June 13, 1961.